Jimmy Fallon, James Corden croon Sinatra and Bennett tunes

Jimmy Fallon and James Corden put on an expected show at one of New York’s starriest spots.

After having dinner with Lorne Michaels at Emilio’s Ballato, former “SNL” star Fallon and former “The Late Late Show” host Corden “took to the stage at the secret bar in the back” of the exclusive eatery, a spy told Page Six.

The source said that in the clubby room, “The Eric Newman Jazz Band was playing, and before long, Fallon and Corden were up onstage trading Sinatra and Tony Bennett tunes!”

Corden, 47, who’s currently starring on Broadway in “Art” with Bobby Cannavale and Neil Patrick Harris, “absolutely killed it with ‘My Way,’ and Jimmy followed with a smooth, heartfelt, ‘I Left My Heart in San Francisco,’ ” we hear.

“The Tonight Show” host Fallon, 51, has a history of crooning Tony Bennett tunes.

He suavely sang the same tune in a surprise appearance on “The Voice” in 2023 after appearing in the audience wearing a fake beard and sunglasses.

The rendition got coach John Legend to exclaim at the time, “I’m getting emotional!”

(Bennett passed away in 2023 at the age of 96.)

Corden has previously been known to perform Sinatra songs as well. In 2017 he reworked a version of “L.O.V.E.” by the Chairman of the Board to protest the transgender military ban.

The “Peter Rabbit” star also previously did a duet with Stephen Colbert on the air in 2015 to sing Sinatra’s “Me and My Shadow.”

Other famous folks who’ve partied in the revered restaurant’s private back room in the past include Rihanna, Brad Pitt and Leonardo DiCaprio.

Taylor Swift famously had a girls’ night out there with Blake Lively, Brittany Mahomes and Sophie Turner after the “Game of Thrones” star separated from Joe Jonas. (But Jonas is also close friends with the family who owns the eatery, and once dubbed Emilio’s Ballato one of his favorite restaurants in New York.)